Struct wasmtime_wasi::snapshots::preview_1::Wasi

pub struct Wasi {
    pub args_get: Func,
    pub args_sizes_get: Func,
    pub environ_get: Func,
    pub environ_sizes_get: Func,
    pub clock_res_get: Func,
    pub clock_time_get: Func,
    pub fd_advise: Func,
    pub fd_allocate: Func,
    pub fd_close: Func,
    pub fd_datasync: Func,
    pub fd_fdstat_get: Func,
    pub fd_fdstat_set_flags: Func,
    pub fd_fdstat_set_rights: Func,
    pub fd_filestat_get: Func,
    pub fd_filestat_set_size: Func,
    pub fd_filestat_set_times: Func,
    pub fd_pread: Func,
    pub fd_prestat_get: Func,
    pub fd_prestat_dir_name: Func,
    pub fd_pwrite: Func,
    pub fd_read: Func,
    pub fd_readdir: Func,
    pub fd_renumber: Func,
    pub fd_seek: Func,
    pub fd_sync: Func,
    pub fd_tell: Func,
    pub fd_write: Func,
    pub path_create_directory: Func,
    pub path_filestat_get: Func,
    pub path_filestat_set_times: Func,
    pub path_link: Func,
    pub path_open: Func,
    pub path_readlink: Func,
    pub path_remove_directory: Func,
    pub path_rename: Func,
    pub path_symlink: Func,
    pub path_unlink_file: Func,
    pub poll_oneoff: Func,
    pub proc_exit: Func,
    pub proc_raise: Func,
    pub sched_yield: Func,
    pub random_get: Func,
    pub sock_recv: Func,
    pub sock_send: Func,
    pub sock_shutdown: Func,
}

An instantiated instance of the wasi exports.

This represents a wasi module which can be used to instantiate other wasm modules. This structure exports all that various fields of the wasi instance as fields which can be used to implement your own instantiation logic, if necessary. Additionally Wasi::get_export can be used to do name-based resolution.

Fields

args_get: Func

args_sizes_get: Func

environ_get: Func

environ_sizes_get: Func

clock_res_get: Func

clock_time_get: Func

fd_advise: Func

fd_allocate: Func

fd_close: Func

fd_datasync: Func

fd_fdstat_get: Func

fd_fdstat_set_flags: Func

fd_fdstat_set_rights: Func

fd_filestat_get: Func

fd_filestat_set_size: Func

fd_filestat_set_times: Func

fd_pread: Func

fd_prestat_get: Func

fd_prestat_dir_name: Func

fd_pwrite: Func

fd_read: Func

fd_readdir: Func

fd_renumber: Func

fd_seek: Func

fd_sync: Func

fd_tell: Func

fd_write: Func

path_create_directory: Func

path_filestat_get: Func

path_filestat_set_times: Func

path_link: Func

path_open: Func

path_readlink: Func

path_remove_directory: Func

path_rename: Func

path_symlink: Func

path_unlink_file: Func

poll_oneoff: Func

proc_exit: Func

proc_raise: Func

sched_yield: Func

random_get: Func

sock_recv: Func

sock_send: Func

sock_shutdown: Func

Implementations

impl Wasi

pub fn new(store: &Store, ctx: Rc<RefCell<WasiCtx>>) -> Self

Creates a new Wasi instance.

External values are allocated into the store provided and configuration of the instance itself should be all contained in the cx parameter.

pub fn get_export(&self, name: &str) -> Option<&Func>

Looks up a field called name in this structure, returning it if found.

This is often useful when instantiating a wasmtime instance where name resolution often happens with strings.

pub fn add_to_linker(&self, linker: &mut Linker) -> Result<()>

Adds all instance items to the specified Linker.

pub fn add_to_config(config: &mut Config)

Adds the host functions to the given wasmtime::Config.

Host functions added to the config expect [set_context] to be called.

Host functions will trap if the context is not set in the calling wasmtime::Store.

pub fn set_context(store: &Store, ctx: WasiCtx) -> Result<(), WasiCtx>

Sets the context in the given store.

Context must be set in the store when using [add_to_config] and prior to any host function being called.

If the context is already set in the store, the given context is returned as an error.